Queso Fundido Sonorense con Chorizo y Rajas

This is from Sonora. The northern state of cattle ranches, wheat fields, and the wide flour tortilla, where dairy is taken seriously and the queso fundido is built on layered cheese, not the mixed-up stew of melted everything that some places try to pass off.

Sonorense queso fundido is queso Oaxaca and queso asadero. That is the pairing. The Oaxaca pulls into long elastic strands and gives you the texture. The asadero, which Sonora and Chihuahua perfected, melts into a creamy body underneath. Together they do what no single cheese can do alone. The chorizo rojo is rendered until the achiote fat runs orange and crisps the meat at the edges. The rajas are cut from chile poblano roasted black over an open flame. Wider strips than the central-Mexico version. In Sonora the rajas are generous because the rajas matter.

Flour tortillas, not corn. I will say it once and I will not apologize for it. The flour tortilla is a northern tradition tied to the wheat that grows in Sonora's irrigated valleys, and it is the right vehicle for this dish. A real tortilla de harina sonorense is paper-thin, flexible, cooked on a comal, and almost translucent when you hold it up to the light. If you can find them or make them, do. If you reach for a corn tortilla here you have made a different dish. Cada estado, su propia cocina.

My mother was from Jalisco and queso fundido was not her tradition, but she had a friend from Hermosillo who taught her this version one winter in Mexico City. The friend brought her own flour tortillas in a tin and would not let anyone touch the cheese until the cazuela came out of the oven. She was right about that. La cocina no es decoracion, es trabajo.